GN: Introduce templates.

webrtc/video/BUILD.gn

Index: webrtc/video/BUILD.gn
diff --git a/webrtc/video/BUILD.gn b/webrtc/video/BUILD.gn
index 76c2ea64e953541b0fb1f78841e26e1fcf455aa9..1d3f55c4b9ebb8e5aec1efcfa2be174182df5409 100644
--- a/webrtc/video/BUILD.gn
+++ b/webrtc/video/BUILD.gn
@@ -7,9 +7,8 @@
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../build/webrtc.gni")
-import("//testing/test.gni")
 
-source_set("video") {
+rtc_source_set("video") {
   sources = [
     "call_stats.cc",
     "call_stats.h",
@@ -55,7 +54,7 @@ source_set("video") {
   if (is_clang) {
     # Suppress warnings from Chrome's Clang plugins.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
-    configs -= [ "//build/config/clang:find_bad_constructs" ]
+    suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }
 
   deps = [
@@ -80,7 +79,7 @@ source_set("video") {
 
 if (rtc_include_tests) {
   # TODO(pbos): Rename test suite.
-  source_set("video_tests") {
+  rtc_source_set("video_tests") {
     testonly = true
     sources = [
       "call_stats_unittest.cc",
@@ -108,7 +107,7 @@ if (rtc_include_tests) {
     if (is_clang) {
       # Suppress warnings from the Chromium Clang plugin.
       # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
-      configs -= [ "//build/config/clang:find_bad_constructs" ]
+      suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }